Preparation of polyarylene ether ketones

US5580948A · kind A · utility

Assignee

• BASF SE

Inventors

• Eckhard Neufeld · Ludwigshafen am Rhein, DE
• Barbel Arnold-Mauer · Kallstadt, DE
• Jurgen Hofmann · Spalt, DE
• Thomas Heitz · Ludwigshafen am Rhein, DE
• Christoph Sachsenweger · Obrigheim, DE
• Petra Wieland · Worms, DE

Key dates

• Filing date: Aug 3, 1994
• Grant date: Dec 3, 1996
• Expiry date: Aug 3, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/1946
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

For the preparation of polyarylene ether ketones by Friedel-Crafts polycondensation, a reaction mixture consisting of PA0 A. a monomer system, PA0 B. a Lewis acid, PA0 C. if required, a Lewis base and PA0 D. an inert solvent is subjected to polycondensation in two reaction zones, discharged from the second reaction zone with plug flow and compounded. The reaction mixture is subjected to polycondensation in the first reaction zone while stirring to a viscosity of about 2,000 mPa.s, is transferred to the second reaction zone and is discharged therefrom by means of an inert solvent or of an inert gas saturated with the solvent, under from about 6 to 65, preferably from 10 to 25, bar, the transport pressure being reduced in at least two stages and the pressure reduction in the first stage being not more than 60%.